Slicer warning missing (Re: support)

Recently my slicer stopped warning me when a sliced project needs support (via the red warning box on the bottom right of screen)

Is this a bug or a setting I messed up ?

I tested it by setting a 100mm bar at over my 30 deg threshold and no warning. When I added support the sliced object had support(meaning it needs it)

Any help would be much appreciated